09/07/2026
What does a helicopter trim tab actually do? 🚁
It might look like a small adjustment, but the trim tab plays a huge role in how a helicopter flies.
Mounted on the trailing edge of the main rotor blade, the trim tab is carefully adjusted to fine-tune the aerodynamic characteristics of each blade. Even the smallest change can help reduce rotor track differences and minimise vibration, resulting in a smoother, more efficient flight.
Every adjustment is made with precision, following maintenance data and confirmed through track and balance flights to ensure the rotor system performs exactly as intended.
It’s another reminder that in helicopter engineering, it’s often the smallest details that make the biggest difference.